Chemistry, 15.10.2019 07:20, MileenaKitana
Which statement is not true?
a. the atomic radius of na is less than the atomic radius of mg.
b. the electronegativity of c is greater than the electronegativity of b.
c. the ionic radius of br- is greater than the atomic radius of br.
d. the first ionization energy of k is greater than the first ionization energy of rb.
Answers: 1
Chemistry, 22.06.2019 12:00, sophiaa23
Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.
Answers: 2
Chemistry, 22.06.2019 18:30, chinadoll24
Asample of hydrated tin (ii) chloride (sncl2) has a mass of 4.90 g. when it is dehydrated, it has a mass of 4.10 g. which is the correct chemical formula for the hydrate? sncl2•2h2o sncl2•4h2o sncl2•6h2o
Answers: 2
Chemistry, 23.06.2019 00:30, rose888829
The footprints of a dinosaur and the burrow of an ancient shrimp are examples of which kind of fossils
Answers: 2
Which statement is not true?
a. the atomic radius of na is less than the atomic radius...
a. the atomic radius of na is less than the atomic radius...
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